{
  "name": "Webmail",
  "short_name": "Webmail",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#f4f5f3",
  "theme_color": "#0f5c54",
  "icons": [
    {
      "src": "/icon-192.png?v=3",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/icon-512.png?v=3",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "/icon.svg?v=3",
      "sizes": "any",
      "type": "image/svg+xml"
    }
  ],
  "protocol_handlers": [
    {
      "protocol": "mailto",
      "url": "/?mailto=%s"
    }
  ]
}